Let's Make Robots!

Log in to get help, show off, share and inspire:

wrench_orange.png Your work in progress or a finished robot: Robot project
script_edit.png Write in your own blog: Blog entry
comments.png Discussions and questions: Forum topic
brick.png Show what you are making robots of: Component
lightbulb.png Help others with what you have learned: Tip or walk through
link.png Add a news item or cool link: Web link

Reflow Oven Fan Modified == Good PID loop \0/

16 May 2011

Today I made a slight modification to the toaster oven to see if I can improve the PID loop response.  I was having issues with oscillations no matter how much I adjusted the PID gains.  I suspected this was because I turned the oven on/off in response to the PID output.  This meant the internal oven fan pulled the temperature down below the setpoint a bit every time the oven was turned back on again.  Another side affect is the temperature would overshoot the setpoint a bit once the PID attempted to compensate for the undershoot.

Looks for brass flies to eat
Using a
This is Venux, my steampunk-inspired brass fly trap. There's more information on my Build a brassier flytrap blog. One flower is complete, with touch sensor and … Read more
Throws oranges when it sees a certain color
This is a catapult/trebuchet made of canes, which controlled by a PC via an arduino and a servo connected to it using a USB cable. The computer runs the … Read more

Frits in ad :)

I was just doing this ad for Danish TV, and we talked about what it meant, so here is a rough translation:

Fat guy:

Now, we told the Danes for several years that they can cross this bridge to Sweden for half price, if they'd just get a "bropas" (electronic device you pay with instead of credit card) - but they just don't get it. We have made an experiment! (There are 2 signs, one says half price, and I drive onto the other)

Hello, friend (jokes with bad swedish/danish language)



Is something wrong?

Success! First Test Board Reflowed

15 May 2011 - Update

I have successfully reflow soldered a test PCB.  I got the PID routine tuned a bit and was itching to test out the reflow controller.  So, I applied some solder paster to a old relay controller board I developed and successfully soldered some components to the board.

Below are some pictures of solder paste and components applied to the PCB.

Vibrate around phototropically with tactile feelers
UPDATE: ADDED VID WITH NEW EYES AND SOME THOUGHTS AT THE BOTTOM. One of my lower priority robots but thought I'd post it up for scrutiny anyhow. My plan is to use … Read more
 This is the robot I built to solve the Towers of Hanoi puzzle . It uses three rc servos and a Picaxe 08M . This is the first time I've used the picaxe  but I … Read more

Chess Update

5.11.11 This update is running Grog's MRL program

The first video explains it well I hope.


5.14.11 The second video shows that I have changed the chess robot so it no longer goes back to a8 (the starting position) after every move. The code now calculates how to perform the next move from the location the chess robot's gantry crane ends at. I have also programmed in the ability for the robot to perform a castling move that the chess engine often does (this is not seen in the video)


The Uno32 is an Arduino-compatible platform combining Arduino compatibility with the performance of the Microchip PIC32 microcontroller -- core running at 80Mhz, … Read more

Towards a auto-aiming servo controled directional wifi antenna

I'm planning a project to get an auto-aiming directional wifi antenna working to provide a long-distance repeater for a boat at anchor connecting to access points we don't control.I think this is a robot, but a simple one.  I think it's a robot because it senses its environment and responds to it.  Sadly it won't be very pretty but it might be useful.  It will definitely be fun ;)

A ridiculously powerful Arduino form factor board

Clicking around, I found this PIC32-based board.  It's the same form factor as an Arduino Mega board, but it's powered by a PIC32 running at 80MHz.  This is an 80MHz MIPS CPU too (a RISC CPU you'll see all over the place, and is somewhat similar to ARM) that has integrated USB and Ethernet support.  Not to mention 512k of flash and 128k of SRAM.  That's a lot of horsepower for a little board.  And it's only $50, that's not bad at all.

It is the Same DAGU arm in the prevous posts, but the controller is now different. The controller board is Roboduino … Read more

Robot Mesh Network

Hi there!

I haven't been on LMR in a long time... here's a video of my robot mesh network working. It's been a while in development. ;)

Planning to make a tutorial for it, and I will post it here, eventually. Woohoo!

Skip ahead to the 6:30 mark to avoid the boring debugging (yay for unedited videos!)

The embedded video isn't working for me, so here it is: http://youtu.be/KSGt83BzX74


(Admin edit, video embedded)

Starting off this submission -   A small project to build a small hexapod walker - Whilst working on a bigger 'bot, I thought I'd make my first real robot, a bit … Read more

Note: You can follow some projects some of the time, but you cannot follow all the projects all the time.

Recently collected

I'm working on improving the stride length of the original BoB logic (four servo walk). I decided to add two hip servos and I hope I can get away without adding … Read more
I am currently developing an new robot - Neurono. The robot will be controlled by a custom build neural computer. The computer consists beside of some sensor/actor … Read more
Simply using a hand from an opensource robot called Inmoov and controlling it through the use of a glove and XBees. The full size robot of the hand can be found at InMoov.fr
A 4 years after making my balancing bliepbot, i planned to make a Johnny-five-like robot. I still had some parts from bliepbot: nimh batteries, parallax … Read more
Navigates via 3 IR Switches, Plays "hide and go seek", makes semi-intelligent course corrections, gives audio and visual feedback via buzzer and lcd display, remote controlable
Using a
I built this robot as an all-around robot to jump start my way into Arduino. I self taught myself everything about this robot from code to hardware and have taken … Read more

Arduino + ESP8266 Wifi Self balancing robot

Hi, I just found (and bought) a cool robot that uses the Arduino Leonardo+ ESP8266 Wifi module to communicate with a smartphone/tablet/Ipad: 
This is a robot I'm working on. Has a Zed depth camera for SLAM Also has Lidar Lite. RoboClaw motor controller and 2 nvidia Jetson boards. Also GPS and an IMU unit. … Read more